オリジナル投稿者： Chris Green ,
The thick black substance is epoxy that Micosoft applies to the boards to prevent reverse-engineering, and drive re-flashing. It probably isn't causing your problem. If your drive isn't being supplied power, then you may have a damaged console motherboard. Check around the motherboard for damage or broken traces. Also make sure that the DVD power connector is firmly attached and not damaged. If you have a multimeter, you can check the voltages of the connector using [http://imageshack.us/photo/my-images/42/dvddrivecableheadpinout.jpg/sr=1|this diagram].